Hi, I need some explanation about 74191 synchronous 4-bit up/down counter with mode control, works.. I have read the datasheet, but I still don't quite understand how it works.
Suppose, I have an input value, and I want to make 74191 counts it, three times, then terminated. for instances, my first input 00, 01, and 11, I want the counter to read it one by one, then after it reaches three times, it should terminate.
how to make the counter read it? in 74191 got 4 input value, 4 output and 1 enable chip. do I connect the input of the counter to my previos input (00,01 and 11) ? or just use the enable chip to counts? but then how do I know it's already reach three counts?
Suppose, I have an input value, and I want to make 74191 counts it, three times, then terminated. for instances, my first input 00, 01, and 11, I want the counter to read it one by one, then after it reaches three times, it should terminate.
how to make the counter read it? in 74191 got 4 input value, 4 output and 1 enable chip. do I connect the input of the counter to my previos input (00,01 and 11) ? or just use the enable chip to counts? but then how do I know it's already reach three counts?